The engine starts great but after 2-3 minutes it won't idle. It has run like a champ until 2 days ago and only has about 1300 miles on it. It is a 350 bored 20 over, camel back heads with Edelbrock Performer cam, intake and carb. everything else is pretty much stock. I took it out muddin about 2 weeks ago and it ran fine all week after that. The Could this be a bad choke?

 

You can pull the air breather off and inspect the choke. When cold the primary butterfly should be closed to allow a richer mixture. When the engine warms it should open. I would be thinking more a electrical issue with your recent muddin trip.

I would look at the distributor, cap, rotor. Fairly common issure after a wet condition. If OK then next check plug wires.

Another issue with older vehicles is always the catalytic convertors. The go out and plug up at most any moment.

Just a few ideas.....

 

Thanks. I have checked the distributor, plugs and wires and they are all fine. I had planned to take the cat of this weekend anyway so that may do it. Another post had talked about when the EGR valve is bad or stuck it creates these same symptons so I will check that too. Thanks for you suggestions!